Am trying to setup a Cisco 2800 we have spare as a fail-over device for the second network we run for visitors or anyone just wanting straight forward Internet access.

The router we have has two ADSL WICs and I am attempting to setup each for a different broadband connection with the failover coming in if required with the router acting as the DHCP.

Problem is this is beyond my current scope of dealing with IOS and I am struggling on pretty much each aspect of the config - more because I have confused myself than anything else.

Though the basic outline is it needs to connect to two different ADSL connections, act as DHCP, and act as a failover between connections if require (believe the NAT has to be configured in the dialer settings?).

In all reality however, the proper way to do this is set up both connections inbound to be active at all times, then, just set your route costs so that if the primary should fail, the secondary will begin taking over outbound. You will need a managed DNS service like EasyDNS or Netriplex to monitor the IP's, and change your outside DNS records should one interface go down.

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